Specifications

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Cisco 1800 Series Integrated Services Routers (Fixed) Software Configuration Guide
OL-6426-02
Chapter 1 Basic Router Configuration
Configuring Basic Parameters
Configure WAN Interfaces
The Cisco 1811 and Cisco 1812 routers each have two Fast Ethernet interfaces for WAN connection.
The Cisco
1801, Cisco 1802, and Cisco 1803 routers each have one ATM interface for WAN
connection.
Based on the router model you have, configure the WAN interface(s) using one of the following
procedures:
• Configure the Fast Ethernet WAN Interface
• Configure the ATM WAN Interface
Configure the Fast Ethernet WAN Interface
This procedure applies only to the Cisco 1811 and Cisco 1812 router models. Perform these steps to
configure the Fast Ethernet interfaces, beginning in global configuration mode.
Repeat these steps for the other Fast Ethernet WAN interface if desired.
Command Purpose
Step 1
interface type number
Example:
Router(config)#interface fastethernet 0
Router(config-int)#
Enters the configuration mode for a Fast
Ethernet WAN interface on the router.
Note Fast Ethernet WAN ports are numbered
0–1 on the Cisco
1800 series routers.
Step 2
ip address ip-address mask
Example:
Router(config-int)# ip address 192.1.12.2
255.255.255.0
Router(config-int)#
Sets the IP address and subnet mask for the
specified Fast Ethernet interface.
Step 3
no shutdown
Example:
Router(config-int)# no shutdown
Router(config-int)#
Enables the Ethernet interface, changing its
state from administratively down to
administratively up.
Step 4
exit
Example:
Router(config-int)# exit
Router(config)#
Exits interface configuration mode and returns
to global configuration mode.